EMPLOYEE BENEFIT PLAN (Tables)

3 Months Ended

Mar. 31, 2018

EMPLOYEE BENEFIT PLAN [Abstract]

Components of Net Periodic Benefit Cost

Net periodic benefit costs for such retirement medical plan were as follows:

	Three Months Ended March 31,
	2018			2017
Service cost	$	19		$	17
Interest cost		11			12
Amortization of prior service cost		18			19
Amortization of gain		(1	)		(4	)
Net periodic benefit cost	$	47		$	44